To disable operations from a command-line, set the /desktop/gnome/lockdown/disable_command_line key to true.
When you disable command-line operations, the following changes occur in the user interface:
The Run Application menu item is removed from the following menus:
Main Menu
Actions submenu in the Add to Panel menu
Actions menu in the Menu Bar applet
Any Run buttons on panels are disabled.
To disable command-line operations, you must also remove menu items that start terminal applications. For example, you might want to remove menu items that contain the following commands from the menus:
/usr/bin/gnome-terminal
/usr/bin/xterm
/usr/bin/setterm
The items are removed from the following menus:
Main Menu
Add to Panel → Launcher from menu
To disable command-line operations, you must also disable the Command Line applet. To disable the Command Line applet, add the applet to the /apps/panel/global/disabled_applets key. When you disable the Command Line applet, the Command Line applet is removed from the Main Menu and the Utility menu.